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Shanker Donthineni 86ba4f7b9f irqchip/gicv3: Workaround for NVIDIA erratum T241-FABRIC-4 
[ Upstream commit 35727af2b1 ]

The T241 platform suffers from the T241-FABRIC-4 erratum which causes
unexpected behavior in the GIC when multiple transactions are received
simultaneously from different sources. This hardware issue impacts
NVIDIA server platforms that use more than two T241 chips
interconnected. Each chip has support for 320 {E}SPIs.

This issue occurs when multiple packets from different GICs are
incorrectly interleaved at the target chip. The erratum text below
specifies exactly what can cause multiple transfer packets susceptible
to interleaving and GIC state corruption. GIC state corruption can
lead to a range of problems, including kernel panics, and unexpected
behavior.

>From the erratum text:
  "In some cases, inter-socket AXI4 Stream packets with multiple
  transfers, may be interleaved by the fabric when presented to ARM
  Generic Interrupt Controller. GIC expects all transfers of a packet
  to be delivered without any interleaving.

  The following GICv3 commands may result in multiple transfer packets
  over inter-socket AXI4 Stream interface:
   - Register reads from GICD_I* and GICD_N*
   - Register writes to 64-bit GICD registers other than GICD_IROUTERn*
   - ITS command MOVALL

  Multiple commands in GICv4+ utilize multiple transfer packets,
  including VMOVP, VMOVI, VMAPP, and 64-bit register accesses."

  This issue impacts system configurations with more than 2 sockets,
  that require multi-transfer packets to be sent over inter-socket
  AXI4 Stream interface between GIC instances on different sockets.
  GICv4 cannot be supported. GICv3 SW model can only be supported
  with the workaround. Single and Dual socket configurations are not
  impacted by this issue and support GICv3 and GICv4."

Link: https://developer.nvidia.com/docs/t241-fabric-4/nvidia-t241-fabric-4-errata.pdf

Writing to the chip alias region of the GICD_In{E} registers except
GICD_ICENABLERn has an equivalent effect as writing to the global
distributor. The SPI interrupt deactivate path is not impacted by
the erratum.

To fix this problem, implement a workaround that ensures read accesses
to the GICD_In{E} registers are directed to the chip that owns the
SPI, and disable GICv4.x features. To simplify code changes, the
gic_configure_irq() function uses the same alias region for both read
and write operations to GICD_ICFGR.

Co-developed-by: Vikram Sethi <vsethi@nvidia.com>
Signed-off-by: Vikram Sethi <vsethi@nvidia.com>
Signed-off-by: Shanker Donthineni <sdonthineni@nvidia.com>
Acked-by: Sudeep Holla <sudeep.holla@arm.com> (for SMCCC/SOC ID bits)
Signed-off-by: Marc Zyngier <maz@kernel.org>
Link: https://lore.kernel.org/r/20230319024314.3540573-2-sdonthineni@nvidia.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
 		2023-05-24 17:32:36 +01:00
..
Kconfig irqchip/gicv3: Workaround for NVIDIA erratum T241-FABRIC-4 2023-05-24 17:32:36 +01:00
Makefile irqchip: Add IMX MU MSI controller driver 2022-09-29 17:11:37 +01:00
alphascale_asm9260-icoll.h
…
exynos-combiner.c Merge branch irq/generic_handle_domain_irq-core into irq/irqchip-next 2021-06-11 14:32:12 +01:00
irq-al-fic.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-alpine-msi.c irqchip/alpine-msi: Fix refcount leak in alpine_msix_init_domains 2023-03-10 09:32:59 +01:00
irq-apple-aic.c irqchip/apple-aic: Make symbol 'use_fast_ipi' static 2022-07-01 14:26:13 +01:00
irq-armada-370-xp.c irqchip/armada-370-xp: Do not touch Performance Counter Overflow on A375, A38x, A39x 2022-05-06 12:18:37 +01:00
irq-aspeed-i2c-ic.c irqchip/aspeed-i2c-ic: Fix irq_of_parse_and_map() return value 2022-05-04 16:37:48 +01:00
irq-aspeed-scu-ic.c irqchip/aspeed-scu-ic: Fix irq_of_parse_and_map() return value 2022-05-04 16:37:48 +01:00
irq-aspeed-vic.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-ath79-cpu.c
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irq-ath79-misc.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-atmel-aic-common.c
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irq-atmel-aic-common.h
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irq-atmel-aic.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-atmel-aic5.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-bcm2835.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-bcm2836.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-bcm6345-l1.c genirq: Add and use an irq_data_update_affinity helper 2022-07-07 09:38:04 +01:00
irq-bcm7038-l1.c irqchip/irq-bcm7038-l1: Switch to IRQCHIP_PLATFORM_DRIVER 2021-10-20 20:06:33 +01:00
irq-bcm7120-l2.c irqchip/irq-bcm7120-l2: Set IRQ_LEVEL for level triggered interrupts 2023-03-10 09:33:07 +01:00
irq-brcmstb-l2.c irqchip/irq-brcmstb-l2: Set IRQ_LEVEL for level triggered interrupts 2023-03-10 09:33:07 +01:00
irq-clps711x.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-crossbar.c
…
irq-csky-apb-intc.c irqchip/csky: Return true/false (not 1/0) from bool functions 2022-05-04 16:49:47 +01:00
irq-csky-mpintc.c irqchip/csky-mpintc: Fixup mask/unmask implementation 2021-11-12 16:09:50 +00:00
irq-davinci-aintc.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-davinci-cp-intc.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-digicolor.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-dw-apb-ictl.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-ftintc010.c irqchip/versatile-fpga: Switch to dynamic chip name output 2022-02-15 11:25:46 +00:00
irq-gic-common.c irqchip/gic: Split vGIC probing information from the GIC code 2021-06-01 10:45:58 +01:00
irq-gic-common.h irqchip/gic: Split vGIC probing information from the GIC code 2021-06-01 10:45:58 +01:00
irq-gic-pm.c irqchip: gic-pm: Use pm_runtime_resume_and_get() in gic_probe() 2022-12-31 13:31:57 +01:00
irq-gic-realview.c irqchip/gic/realview: Fix refcount leak in realview_gic_of_init 2022-06-09 17:36:57 +01:00
irq-gic-v2m.c iommu/dma: Move public interfaces to linux/iommu.h 2022-09-07 14:47:00 +02:00
irq-gic-v3-its-fsl-mc-msi.c
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irq-gic-v3-its-pci-msi.c PCI/MSI: Make pci_msi_domain_write_msg() static 2021-12-09 11:52:20 +01:00
irq-gic-v3-its-platform-msi.c
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irq-gic-v3-its.c IOMMU Updates for Linux v6.1: 2022-10-10 13:20:53 -07:00
irq-gic-v3-mbi.c iommu/dma: Move public interfaces to linux/iommu.h 2022-09-07 14:47:00 +02:00
irq-gic-v3.c irqchip/gicv3: Workaround for NVIDIA erratum T241-FABRIC-4 2023-05-24 17:32:36 +01:00
irq-gic-v4.c arm64/sysreg: Add _EL1 into ID_AA64PFR0_EL1 definition names 2022-09-09 10:59:02 +01:00
irq-gic.c APCI: irq: Add support for multiple GSI domains 2022-07-20 12:05:17 +01:00
irq-goldfish-pic.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-hip04.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-i8259.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-idt3243x.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-imgpdc.c Merge branch irq/generic_handle_domain_irq-core into irq/irqchip-next 2021-06-11 14:32:12 +01:00
irq-imx-gpcv2.c irqchip/imx-gpcv2: Mark imx_gpcv2_instance with __ro_after_init 2021-12-16 15:19:43 +00:00
irq-imx-intmux.c irqchip/imx-intmux: Move PM device over to irq domain 2022-02-09 13:36:53 +00:00
irq-imx-irqsteer.c irqchip/imx-irqsteer: Add runtime PM support 2022-05-04 16:44:51 +01:00
irq-imx-mu-msi.c irqchip/imx-mu-msi: Fix wrong register offset for 8ulp 2022-10-04 23:35:36 +01:00
irq-ingenic-tcu.c irqchip/ingenic-tcu: Use correctly sized arguments for bit field 2021-12-16 15:19:52 +00:00
irq-ingenic.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-ixp4xx.c irq/gpio: ixp4xx: Drop boardfile probe path 2022-04-25 20:53:18 +02:00
irq-jcore-aic.c irqchip/jcore-aic: Kill use of irq_create_strict_mappings() 2021-04-22 15:55:22 +01:00
irq-keystone.c treewide: Replace GPLv2 boilerplate/reference with SPDX - gpl-2.0_30.RULE (part 2) 2022-06-10 14:51:35 +02:00
irq-loongarch-cpu.c irqchip/loongarch: Adjust acpi_cascade_irqdomain_init() and sub-routines 2023-05-17 11:53:53 +02:00
irq-loongson-eiointc.c irqchip/loongson-eiointc: Fix registration of syscore_ops 2023-05-17 11:53:53 +02:00
irq-loongson-htpic.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-loongson-htvec.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-loongson-liointc.c irqchip/loongson-liointc: Fix improper error handling in liointc_init() 2022-12-31 13:31:57 +01:00
irq-loongson-pch-lpc.c irqchip: Add Loongson PCH LPC controller support 2022-07-20 12:09:20 +01:00
irq-loongson-pch-msi.c irqchip/loongarch: Fix irq_domain_alloc_fwnode() abuse 2022-08-09 06:54:05 +01:00
irq-loongson-pch-pic.c irqchip/loongarch: Adjust acpi_cascade_irqdomain_init() and sub-routines 2023-05-17 11:53:53 +02:00
irq-lpc32xx.c irqchip/lpc32xx: Switch to dynamic chip name output 2022-02-15 11:25:46 +00:00
irq-ls-extirq.c irqchip/ls-extirq: Fix endianness detection 2022-12-21 17:48:04 +01:00
irq-ls-scfg-msi.c iommu/dma: Move public interfaces to linux/iommu.h 2022-09-07 14:47:00 +02:00
irq-ls1x.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-madera.c
…
irq-mbigen.c platform-msi: Rename functions and clarify comments 2021-12-16 22:16:39 +01:00
irq-mchp-eic.c irqchip/mchp-eic: Fix return value check in mchp_eic_init() 2021-10-25 09:02:18 +01:00
irq-meson-gpio.c irqchip/meson-gpio: Add support for meson s4 SoCs 2022-03-09 11:19:56 +00:00
irq-mips-cpu.c irqchip/mips: Fix RCU violation when using irqdomain lookup on interrupt entry 2021-07-09 10:18:58 +01:00
irq-mips-gic.c Merge branch irq/misc-5.20 into irq/irqchip-next 2022-07-25 09:45:34 +01:00
irq-mmp.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-mscc-ocelot.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-mst-intc.c irqchip/irq-mst: Support polarity configuration 2021-04-07 13:26:00 +01:00
irq-mtk-cirq.c irq: Fix typos in comments 2021-03-22 04:23:14 +01:00
irq-mtk-sysirq.c irqchip/mtk-sysirq: Skip setting irq-wake 2021-08-12 08:15:15 +01:00
irq-mvebu-gicp.c irqchip/irq-mvebu-gicp: Fix refcount leak in mvebu_gicp_probe 2023-03-10 09:33:00 +01:00
irq-mvebu-icu.c platform-msi: Rename functions and clarify comments 2021-12-16 22:16:39 +01:00
irq-mvebu-odmi.c irqchip/mvebu-odmi: Switch to bitmap_zalloc() 2021-07-26 18:04:11 +01:00
irq-mvebu-pic.c irqchip/mvebu-pic: Switch to dynamic chip name output 2022-02-15 11:25:46 +00:00
irq-mvebu-sei.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-mxs.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-nvic.c ARM development updates for 5.18: 2022-03-23 17:35:57 -07:00
irq-omap-intc.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-ompic.c
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irq-or1k-pic.c irqchip: or1k-pic: Undefine mask_ack for level triggered hardware 2022-06-28 17:31:15 +09:00
irq-orion.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-owl-sirq.c
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irq-partition-percpu.c irqchip/partitions: Switch to bitmap_zalloc() 2021-07-26 18:01:27 +01:00
irq-pic32-evic.c irqchip/mips: Fix RCU violation when using irqdomain lookup on interrupt entry 2021-07-09 10:18:58 +01:00
irq-pruss-intc.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-qcom-mpm.c irqchip/irq-qcom-mpm: fix return value check in qcom_mpm_init() 2022-04-05 16:33:13 +01:00
irq-rda-intc.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-realtek-rtl.c irqchip/realtek-rtl: use parent interrupts 2022-09-28 14:17:10 +01:00
irq-renesas-intc-irqpin.c irqchip/renesas-intc-irqpin: Move PM device over to irq domain 2022-02-09 13:36:44 +00:00
irq-renesas-irqc.c irqchip/renesas-irqc: Move PM device over to irq domain 2022-02-09 13:36:53 +00:00
irq-renesas-rza1.c irqchip/renesas-rza1: Use semicolons instead of commas 2021-09-22 14:37:59 +01:00
irq-renesas-rzg2l.c irqchip: Add RZ/G2L IA55 Interrupt Controller driver 2022-07-10 09:30:00 +01:00
irq-riscv-intc.c riscv: cpu: Add 64bit hartid support on RV64 2022-07-19 16:39:14 -07:00
irq-sa11x0.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-sifive-plic.c RISC-V Patches for the 5.20 Merge Window, Part 1 2022-08-06 15:04:48 -07:00
irq-sl28cpld.c
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irq-sni-exiu.c irqchip/exiu: Fix acknowledgment of edge triggered interrupts 2022-05-04 16:33:17 +01:00
irq-sp7021-intc.c irqchip: Add Sunplus SP7021 interrupt controller driver 2022-07-08 14:23:57 +02:00
irq-st.c
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irq-stm32-exti.c irqchip/stm32-exti: Remove check on always false condition 2022-09-12 16:31:25 +01:00
irq-sun4i.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-sun6i-r.c irqchip/sun6i-r: Use NULL for chip_data 2022-05-04 16:36:59 +01:00
irq-sunxi-nmi.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-tb10x.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
irq-tegra.c irqchip/tegra: Fix overflow implicit truncation warnings 2022-06-15 17:41:11 +02:00
irq-ti-sci-inta.c soc: ti: ti_sci_inta_msi: Use msi_desc::msi_index 2021-12-16 22:16:40 +01:00
irq-ti-sci-intr.c irqchip/ti-sci: Fix refcount leak in ti_sci_intr_irq_domain_probe 2023-03-10 09:33:00 +01:00
irq-ts4800.c irqchip/ts4800: Switch to dynamic chip name output 2022-02-15 11:25:46 +00:00
irq-uniphier-aidet.c irqchip/uniphier-aidet: Add compatible string for NX1 SoC 2022-06-09 17:41:57 +01:00
irq-versatile-fpga.c irqchip/versatile-fpga: Switch to dynamic chip name output 2022-02-15 11:25:46 +00:00
irq-vf610-mscm-ir.c
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irq-vic.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-vt8500.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irq-wpcm450-aic.c irqchip/wpcm450: Fix memory leak in wpcm450_aic_of_init() 2022-12-31 13:31:57 +01:00
irq-xilinx-intc.c irqchip/xilinx: Switch to GENERIC_IRQ_MULTI_HANDLER 2022-03-04 14:32:57 +00:00
irq-xtensa-mx.c irqchip/xtensa-mx: Fix initial IRQ affinity in non-SMP setup 2022-05-04 16:35:38 +01:00
irq-xtensa-pic.c
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irq-zevio.c irq: remove handle_domain_{irq,nmi}() 2021-10-26 10:13:31 +01:00
irqchip.c irqchip: Fix refcount leak in platform_irqchip_probe 2023-03-10 09:32:59 +01:00
qcom-irq-combiner.c irqchip: Bulk conversion to generic_handle_domain_irq() 2021-06-10 13:09:19 +01:00
qcom-pdc.c irqchip/qcom-pdc: Drop open coded version of __assign_bit() 2022-03-01 10:06:25 +00:00
spear-shirq.c irqchip/spear-shirq: Add support for IRQ 0..6 2021-12-16 13:29:44 +00:00